MODEL OF A CALCULATING MACHINE

‘Preliminary account of certain logical inventions’, communicated March 19th, 1866 [in: Proceedings of the Literary and Philosophical Society of Liverpool. During the fifty-fifth session, 1865-66. No. XX]. London, Longman …, Liverpool, Marples, 1867.

London, Longman …, Liverpool, Marples, 1867.

8vo, pp. ii, 173-232; a clean copy, in recent wrappers; stamp of the Geologists’ Association, London.

£350

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‘Preliminary account of certain logical inventions’, communicated March 19th, 1866 [in: Proceedings of the Literary and Philosophical Society of Liverpool. During the fifty-fifth session, 1865-66. No. XX]. London, Longman …, Liverpool, Marples, 1867.

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First edition of the account of Jevons’ communication on the ‘logical abacus’ and the ‘logical machine’, a precursor of his later ‘logical piano’. Jevons had experimented with different forms of teaching aids before creating his logical piano. On this occasion, early in his career, Jevons (pp. 177-179) organized a practical demonstration and set forth the purpose and functions of his newly devised calculating and logical machine– a comparatively simple device consisting of a number of marked blocks of wood that could be manipulated on a series of shelves to produce the solution to a logical problem. He considers his work within the tradition of ‘mechanical logic’, from Aristotle to Babbage

Inoue and White 66; not in Letters and journal.

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